The four common blood types of today include A, B, AB and O. The differences between each blood type is dependent on the proteins in the blood, but when it comes to RH negative blood types, which make up about 10 to 15 percent of the population, they don’t have these proteins.

The question that is on the minds of scientists now, is where this group of RH negative blood type people originates from. Looking back about 35,000 years, scientists believe that the blood type is linked to specific tribes and groups. Europeans have the greatest incidence of this blood type, but only 3% of African-Americans have it, and only 1% of Asian people have it.

Some common characteristics of people with this blood type include having a higher IQ, having a lower body temperature, having more awareness (physically and emotionally), having red hair, being sensitive to heat, and having blue, green or hazel colored eyes.

This blood type is shrouded in even more mystery when we look at pregnant women. RH negative women who become pregnant have difficulty delivering a baby with an RH positive blood type, as their bodies naturally attack and try to kill the fetus. Thus, they are given a special sterilization solution.

But, why would the woman’s body attack the offspring it’s been helping give life to?

This is where a relatively new theory comes in and suggests that it’s possible alien life has influenced this blood type. What’s even stranger is that almost every person who has reported being abducted by (or interacted with) aliens has the RH negative blood type.

It’s certainly very possible that aliens visited our planet, as they’ve done for centuries, and somehow tooled around with the genetics of mankind. After all, history from all over the world has shown time and time again, through ancient texts and depictions, that we’ve been visited by beings not of this world.